Suspended roof.



l. VAN BRUNT.

SUSPENDED ROOF.

APPLICATION FILED APR. I2. Isla.

192 11,71., Patented (m15, 1918.-

IN TOR. mr: Van runZ A TTORNEYS.

JOHN VAN' '.BRUNT, OF NEW YORK, N. Y., ASSIGNOR TO COMBUSTION ENGINEERING CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

l SUSPENDED ROOF.

Application led April 12, 1918. Serial No. 228,122.

To all whom t may concern.'

Be it known that I, JOHN VAN BRUNT, a citizen of the United States, residing at the city, county, and State of New York, have invented a certain new and useful Improvement in Suspended Roofs, of which the following is a full, clear, and exact description.

My invention relates to suspended roofs and has for its object to produce a simple and substantial suspended roof adapted for roofs of furnaces, arches, ceilings, iioors and the like wherein it is desirable to build up a roof having a substantially even under surface from tiles or blocks and remove and replace portions thereof. It further has for its object to produce a Water cooled suspended roof having such an under surface in which portions may be easily removed and replaced, and in which the supporting bars or conduits are substantially protected from the direct action of the heat of the furnace. It further has for its object to provide a roof of the above character in which provision is made for lateral expansion produced by a rise of temperature.

The following is a description of an embodiment of my invention, reference being had to the accompanying drawings, in which,

Figure 1 shows in perspective a section of a roof embodying my invention;

Fig. 2 shows a transverse section through a ortion of the same;

ig. 3 shows a similar section with one of the tiles or blocks so tilted that it can be inserted or removed;

Fig. 4 shows a Vtransverse section of another portion of the roof in which tiles or blocks of diiferent shapes are employed, these tiles or blocks being used for the edge portions of the roof, and

Fig. 5 shows one of the edge tiles or blocks tilted so that it can be easily removed or inserted.

Referring more particularly tothe drawings, 1-1 and 2-2 are supporting bars the same in the embodiment shown being pipes supplied with circulating water from any convenient source Vand acting as a cooling medium in the well known manner. 3-4 and 3-4 are tiles or blocks of which there are a plurality of pairs between each two pair of adjacent bars.

The two blocks 3 and 4 are provided with recesses 5 and 6 respectively, each of which partially embraces one of the bars or pipes l, l so that when the blocks are in position these bars are well protected from heat on their under sides-and are so shaped at their lower portions as to constitute a roof having va substantially continuous even under surface'. The upper portions of the inner surfaces of the blocks 3 and 4 abut'on one another at the portions 7, so as to make binding engagement with one another, and their outer edges being supported by the bars 1-1, each serves to hold the other in po-` sition.

In order that the blocks may be inserted and removed, I provide the block 4 with a receding surface 8 beginning at a point above the horizontal plane connecting the centers of the two bars 1 1. This surface is preferably a cylindrical surface of revolution about the bar l engaged by the block 4 and graduall recedes in a downward direction away rom a plane vertical to the horizontal plane passing through the axis of said ad3acent bars and parallel to said bars. The portions 7 of the inner surfaces of said blocks are preferably substantially parallel to said vertical plane. The block 4 has at .the upper portion of its outer surface a cut-away portion 9 inclining inwardly toward itsmedial plane and the block 3 has a corresponding cut-away portion 10, these cut-away portions permitting the block 4 to be turned about its bar 1 to the position shown in Fig. 3, so that it may thereafter be lifted upwardly and removed. After the block 4 has been removed, the block 3 can be taken out without difficulty.

In assembling the roof, the block 3 isy first placed in the position shown in Fig. 3 and the block 4 is then introduced by a downward movement, while held in the position shown in dotted lines, to the position shown in full lines, and thereupon turned about its bar 1 to the position shown in Fig. 2, whereupon it is held in position by reason of its binding engagement with the surface 7 of the other bloc In order to enable the block 4 to be easily inserted, and to be removed aftera slight` which escapes the bar 1 as the block is either Patented Oct, 115, 91130 marvel introduced or removed, after being tilted as shown in Fig. 3.

The block 3 is preferably shaped as shown in Fig. 2, the lower portion beneath its recess 5 extending beneath the pipe 1 so as to, in conjunction with the corresponding extension of the block 4 of an adjacent pair, interpose insulating material between the bar 1 and the heat, a slight space being lefty between the two extensions to permit eX- pansion. The lower portion of the inner side of the block 3 is preferably concave as at 12 so as to correspond to the convex` surface 8 and is preferably a' cylindrical surface of revolution about the axis of the right hand bar 1. The concave surface 14 extends partially beneath the convex surface 8. It permits the block 4 to be turned about the bar 1 but block 3 is thereby prevented from being turned about the bar 1 until after the block 4 has been removed. In order to aid in the insertion and removal of the block 4, I cut away the lower portions of the inner sides of one of the two blocks so as to form a narrow space between the surfaces 8 and 12, the spacing preferably extending to a point somewhat above the plane passing through the centers of the bars 1-1. This results not onl in a provision which permits expansion wit out injury but also enables the under side of the roof to be substantially smooth and continuous and allows the block 4 to be entirely separated from the block 3 by a very slight movement of rotation, separation taking place theoretically just after such movement of rotation is started. In order to further provide for expansion, I make the recesses 5 and 6 in the sides of the blocks 3 and 4 of slightly larger diameter than the bars 1--1 The inclined surfaces 9 and 10 above referred to are such that neither of the tiles 3 and 4, when in position, extends to the center of the top of the bars 1-1, but falls short thereof by quite a distance, an uncovered space being necessary in order to permit the turning of the block 4.

In the form shown in Figs. 4 and 5, the same general principles are involved. In this form, the block 3 has its left hand side of the same shape as the left hand side of the block 3. The right hand side of the block 3 is, however, of greater height and has its surface of revolution 12 extended to a higher point. The left hand side of the block 4 has its surface of revolution extended to a correspondingly higher point and the right hand side of the block 4 has a lateral recess having portions 13 and 14 extending well beyond its pipe 2, so as to afford greater protection thereto. Inasmuch as there is at this point no obstruction to prevent the turnin of the block 4 through a large angle, as s own in Fig. 5, for insertion or removal, the top and bottom portions of the recess 6 are made parallel and the other surfaces of that side are made vertical. The tile 4 is inserted and removed in a similar manner to the tile 4 by being turned about its bar 2 a suicient distance to permit of its easy withdrawal in a lateral direction so as to escape any overlying obstacle such as a boiler header 15.

When my invention is used in water cooled furnace roofs or arches, the water circulated through the hollow bars or pipes 1, 1 and 2, 2 serves to carry off heat so as to maintain the parts relatively cool in the presence of high heat. With the parts as shown, the roof can be easily installed or repaired and is not liable to be injured by expansion under severe conditions.

As will be evident to those skilled in the art, my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.

What I claim is:

1. In a suspended roof, the combination of a plurality of parallel bars, a plurality of pairs of blocks, each block of each pair having on its outer side a recess for one of two adjacent bars and having the upper portion of its inner sides substantially vertlcal, the lower parts of the inner sides of the blocks of each pair being slightly spaced apart and one of said blocks being free to turn in one direction about its bar so as to be removed and holding the other block against turning in either direction.

2. In a suspended roof, the combination of a plurality of parallel bars, a plurality of pairs of blocks, each block of each' pair having on its outer side a recess for one of two adjacent bars and having the upper portion of its inner side substantiall vertlcal, the lower parts of the inner si es of the blocks of each pair being slightly spaced apart and one of said blocks being free to turn in one direction about its bar and holding the other block against turning in either direction, the lower portion of one of said inner sides extending partially under the other inner side.

3. In a suspended roof, the combination of a plurality of parallel bars, a plurality of pairs of blocks, each pair spanning the space between two adjacent bars, each block of a given pair having an outer surface provided witha recess partially embracing one of said bars, and an inner surface, the inner surface of one block being convex at its lower portion and at its upper portion making binding engagement with the upper portion of the inner surface of the other block, the ldistances between the upper portion of the inner surface of the block having the convex surface and the center of the bar engaged thereby being greater than the distances between the lower portion of said surface and said center, the lower portion of the inner surface of said other block being concave and Separated from said convex lower portion oi the other block.

4. ln e suspended roof, the combination of a plurality of parallel bars, a plurality ef pairs of blocks each pair spanning the space between the adjacent bars, each block of a given pair having an outer surface provided with a recess partially embracing one oi said bars, and an inner surface, the inner surface of one block being convex at its lower portion and at its upper portion making binding engagement with the upper portion or the inner surface of the other block,

the distances between the upper portion of the inner surface of the block having the convex surface and the center of the ber engaged thereby being greater than the distances between the lower portion of said surface andl said center's the lower portion of the inner surface of said other block being concave, the surfaces of said lower concave and convex portions being substantial@7 surfaces of revolution about an axis approximating the axis of the bar engaged by the block having the eonvex surface.,

JHN VAN 

